﻿using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;

namespace Game.Objects.Internal
{
/*
    public sealed class ExtensionCollection<T> : 
        Collection<IExtension<T>>, IExtensionCollection<T>
        where T : IExtensibleObject<T>
    {
        T owner;

        public ExtensionCollection(T owner)
        {
            this.owner = owner;
        }

        public ExtensionCollection(T owner, object syncRoot)
        {
            this.owner = owner;
        }

        bool ICollection<IExtension<T>>.IsReadOnly
        {
            get { return false; }
        }

        protected override void ClearItems()
        {
            IExtension<T>[] array;

            array = new IExtension<T>[this.Count];
            this.CopyTo(array, 0);
            base.ClearItems();

            foreach (IExtension<T> extension in array)
            {
                extension.Detach(this.owner);
            }
        }

        public E Find<E>()
        {
            foreach (IExtension<T> item in this)
            {
                if (item is E)
                {
                    return (E)item;
                }
            }

            return default(E);
        }

        public Collection<E> FindAll<E>()
        {
            Collection<E> result = new Collection<E>();
            foreach(IExtension<T> item in this)
            {
                if (item is E)
                {
                    result.Add((E)item);
                }
            }
  
            return result;
        }

        protected override void InsertItem(int index, IExtension<T> item)
        {
            item.Attach(this.owner);
            base.InsertItem(index, item);
        }

        protected override void RemoveItem(int index)
        {
            this.Items[index].Detach(this.owner);
            base.RemoveItem(index);
        }

        protected override void SetItem(int index, IExtension<T> item)
        {
            throw new InvalidOperationException();
        }
    }
    */
}
